1. Dial international access code / IDD: ddd

Note that some mobile operators do not require dialing an IDD and/or allow use of substitute characters (such as '+') in lieu of dialing an IDD. As well, in many cases you don't dial an IDD when using a calling card or VoIP service.

Dialing Tips

If you are in an office or building with a main switchboard or PBX, make sure you have a live outside line by dialing '9' or similar

Some mobile carriers provide shortcuts for making international calls - generally, by changing if or how an IDD is dialed. E.g., In Canada, t-mobile allows you to dial a '+' instead of an IDD when calling international numbers.